In order to remind everyone that a new Wolverine film is coming this summer, a new foreign trailer has been released and it's a bit more SPOILERY than the previous trailers. Then again, it's a movie trailer so get over it.
"Your ability to heal can be passed to another." A quote straight from this new trailer. This opens the door for the possible realization that the old man who Logan saved might be scheming Logan to steal his healing ability for himself. Just a guess though.